How to create a new Buddypress menu item in profile page?

Copy this code to your functions.php file

add_action( 'bp_setup_nav', 'wdes_bp_add_nav_item', 100 );
function wdes_bp_add_nav_item(){
	// Add music page in my profile menu item
	bp_core_new_nav_item(
		array(
			'name'                => 'My Music',
			'slug'                => 'my-music',
			'default_subnav_slug' => 'sub-music',
			'screen_function'     => 'my_music_screen_function',
			'show_for_displayed_user' => true, 
			'position' => 160
		)
	);				
	// Add upload music page in my profile menu item under music page
	bp_core_new_subnav_item( 
		array( 
			'name'            => __( 'Upload Music' ), 
			'slug'            => 'upload-music', 
			'parent_url'      => $bp->loggedin_user->domain . 'profile', 
			'parent_slug'     => 'profile', 
			'screen_function' => 'upload_music_screen_function_callback',
			'position'        => 20,
		)
	);
}
function my_music_screen_function() {
		add_action( 'bp_template_content', 'my_music_bp_template_content' );
		bp_core_load_template( 'bp_template_content' );
}
function my_music_bp_template_content(){
	// Create a file inside your theme folder and follow this file path "buddypress/members/single/profile/my-music.php"
	bp_get_template_part( 'buddypress/members/single/profile/my-music' ); // Add your custom code inside my-music.php
}
function upload_music_screen_function_callback() {
 	add_action( 'bp_template_content', 'upload_music_bp_template_content' );
	bp_core_load_template( 'bp_template_content' );
}
function upload_music_bp_template_content(){
	// Create a file inside your theme folder and follow this file path "buddypress/members/single/profile/upload-music.php"
	bp_get_template_part( 'buddypress/members/single/profile/upload-music' ); // Add your custom code inside upload-music.php
}